Madam Secretary: Wentworth Miller and Private Practice Doc Join Cast

Wentworth Miller (The Flash/DC’s Legends of Tomorrow, Prison Break) will have a recurring role in the CBS drama’s upcoming sixth and final season, TVLine has learned exclusively, playing a ruthless politician who hates the fact that Elizabeth McCord has been elected president.

Miller’s character, Senator Mark Hanson, is chairman of the Senate Intelligence Committee. As such, he’s a major power broker who has substantial influence on Capitol Hill (aka not the best person to have as an adversary).

In addition, Michael Patrick Thornton (Private Practice) will recur as Captain Evan Moore, chief of staff to First Gentleman Henry McCord. Thornton’s character is an Army veteran who served three deployments in Iraq with the 2nd Battalion/7th Cavalry. On his fourth tour, he encountered an IED that left him in a wheelchair.

Miller and Thornton’s arrivals aren’t the only cast changes happening this season. Kevin Rahm has been promoted to series regular for the show’s swan song. Meanwhile Keith Carradine, Sara Ramirez, Sebastian Arcelus, Geoffrey Arend, Kathrine Herzer and Evan Roe will no longer be series regulars in Season 6.